In addition to my earlier (confirmed) bug report regarding the MS Lifecam program incompatibility of version 5.1.864 I face now the next problem: I am using a programcalled "Desktop Sidebar". Whenever I now close the "Internet explorer 8", the desktop sidebar also sometimes crashes!
This did never happen in version 5.0.677. And it also stops happening when I deactivate version 5.1.864 temporarily!?
I can not always repaeat the behaviour, I did not find out yet what may be wrong... So see this as hint to check, please
EDIT: after going back to version 5.0677 I still found the mistake, so it apparently was some different bug and found it in incompatibility between skype plugins and desktop sidebar - sorry but I cannot delete this entry here